# PrepInterview vs IELTS Lab

The clearest difference is in-app purchases: PrepInterview at none against IELTS Lab's 3. PrepInterview also leads on update cadence (every 3 days vs weekly). IELTS Lab's advantage is ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. IELTS Lab sells 3 in-app purchases, starting at $7.99 per 7 days. PrepInterview asks for nothing beyond the download.

PrepInterview ships an update every 3 days, IELTS Lab weekly. The most recent releases landed on October 6, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | PrepInterview | IELTS Lab |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 3 days** | Weekly |
| Size | 74 MB | 97 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Sanjeev Kumar](https://appshunter.io/developer/1585480788) | [INGLISH MONSTR, TOO](https://appshunter.io/developer/1871130713) |

## What reviewers say

### PrepInterview

[App page](https://appshunter.io/ios/app/prepinterview-ai-driven-prep/id6756723541)

**Features:** macOS Compatibility

**In-app purchases:** none


### IELTS Lab

[App page](https://appshunter.io/ios/app/ielts-lab-ai-test-prep/id6758140508)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Pro Subscription | $7.99 | per 7 days |
| Monthly Pro Subscription | $9.99 | per month |
| Yearly Pro Subscription | $39.99 | per year |


## Frequently asked questions

### Is PrepInterview free?

PrepInterview is free to download, with no in-app purchases.

### Is IELTS Lab free?

IELTS Lab is free to download, with in-app purchases available.

### Do PrepInterview or IELTS Lab have ads?

PrepInterview shows ads; IELTS Lab does not.

### Which is updated more often, PrepInterview or IELTS Lab?

PrepInterview ships an update every 3 days, and IELTS Lab weekly. Most recently, PrepInterview was updated on October 6, 2026 and IELTS Lab on October 9, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*